Wireless receiver with anti-jamming

• US 20060098767A1
• Filed: 11/02/2005
• Published: 05/11/2006
• Est. Priority Date: 03/09/2001
• Status: Abandoned Application

• Current Assignee: Mobilian T.O. Intel
• Original Assignee: Mobilian T.O. Intel
• Inventors: Zehavi, Ephraim, Bettesh, Ido
• Application Number:
  US11/266,051
• Publication Number:
  US 20060098767A1
• Time in Patent Office: Days
• US Class Current: 375/346
• CPC Class Codes: H04K 3/228 Elimination in the received signal of jamming or of data corrupted by jamming interference suppression in receivers H04B1/10
• CPC Class Codes: H04L 27/2647 Arrangements specific to the receiver only equalisation H04L27/01

Abstract

An embodiment of the present invention provides a method for communicating data in the presence of jamming interference, comprising transmitting a first signal carrying the data from a transmitter to a receiver at a data transmission rate, determining at the receiver that the first signal has been corrupted by the jamming interference, sending a reply from the receiver to the transmitter, indicating that the first signal was corrupted, responsive to the reply, transmitting a second signal carrying the data from the transmitter to the receiver substantially without back-off of the transmission rate, and processing the first and second signals at the receiver to recover the data therefrom.

Claims

1. A method for communicating data in the presence of jamming interference, comprising:

transmitting a first signal carrying the data from a transmitter to a receiver at a data transmission rate;

determining at the receiver that the first signal has been corrupted by the jamming interference;

sending a reply from the receiver to the transmitter, indicating that the first signal was corrupted;

responsive to the reply, transmitting a second signal carrying the data from the transmitter to the receiver substantially without back-off of the transmission rate; and

processing the first and second signals at the receiver to recover the data therefrom.

2. A method according to claim 1, wherein transmitting the first and second signals comprises transmitting data packets.

3. A method according to claim 1, wherein sending the reply comprises processing the corrupted first signal at the receiver so as to identify the transmitter and sending a non-acknowledge reply to the identified transmitter

4. A method according to claim 3, wherein processing the received signal comprises estimating the phase of the jamming interference, and estimating the amplitude of the jamming interference responsive to the phase.

5. A method according to claim 4, wherein estimating the phase comprises feeding the received signal through a phase-locked loop (PLL).

6. A method according to claim 4, wherein jamming interference comprises a modulated signal, and wherein processing the received comprises demodulating the jamming signal so estimate the amplitude thereof.

7. A method according to claim 6, wherein the modulated jamming signal is due to transmission of a Frequency Shift Keyed (FSK) signal in a narrow band, which hops among different frequencies within a wide band of the signal carrying the data, and wherein demodulating the jamming signal comprises demodulating the FSK signal.